Dead battery=Dead Fobs+TPM?

[wacobalt]

Hi all, my car battery died recently (lights left on). After jumping it, the TPM reads all dashes and the fobs no longer work.

I took it to the dealer to reprogram the fobs and they took one look at the car and the symptoms and said that it would be $800-$1200 (diags+parts) because they thought one of the BCM was smoked by the jump start and they wouldn't attempt to re-pair the fobs to the car because it would be a waste of money trying.

1) is this a likely outcome?
2) does anyone know which BCM controls fob+tpm I can skip the expensive diags?

 

[wacobalt]

I love onstar! Solution to dead TPM+Fobs!

Curious to see if onstar could pull the tire pressure remotely I pressed the onstar button. They ran a remote diagnostics while I was driving home from work.

They found that the RKE (remote keyless entry) module was online but at factory (pre-programmed) defaults contrary to the dealership they indicated that the tpm and the rke run from the same interface. They had three current error codes present B3105, C0569, C0775. Which when entered in to a web search engine returns TSB 08-03-16-001B. In short it says under low voltage conditions (in my case a dead car battery) the RKE unit (PN 25974373) may wipe its config and needs to get reprogrammed by a Tech2 tool. They also list a firmware upgrade needed.

This was much better news than the dealership who said that the BCM might be gone and that the tpm and rke couldn't be possibly wiped from a low battery. Plus I saved myself a 3 hour diagnostics fee from the dealer by pressing the blue onstar button during the convenience of my drive home and was able to speak with someone who actually new something about my car compared to the dealerships best 'trained' technician. Now if only they had tried to program the fobs like I asked them to do the first time I was there!

 

[YelloEye]

Nicely done sir!